Performance tuning for the XO

[Pádraig Brady]

C. Scott Ananian wrote:
> We make currently make heavy use of hashing in our upgrade &
> verification infrastructure.  I'd like to find the fastest possible
> implementation of the SHA-256 and/or RIPEMD-160 algorithms.  Can
> anyone offer me advice on the proper compilation options and
> strategies for maximum performance on the processor in the XO?  I
> don't see the -mxo option to gcc yet.
>  --scott

I've no hardware currently to test with unfortunately.
Some links that may be of interest though:

http://lists.laptop.org/pipermail/devel/2006-September/002415.html
http://dev.laptop.org/git?p=geode-perf;a=summary
http://www.lysator.liu.se/~nisse/nettle/
http://www.pixelbeat.org/scripts/gcccpuopt